Date: Fri, 24 Apr 1998 23:01:18 +0200 (CEST) From: Andrzej Bialecki <abial@nask.pl> To: Julian Elischer <julian@whistle.com> Cc: freebsd-current@FreeBSD.ORG Subject: Re: Ouch... (DEVFS) Message-ID: <Pine.NEB.3.95.980424224410.19560B-100000@korin.warman.org.pl> In-Reply-To: <353FC303.2F1CF0FB@whistle.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi!
After your today's patches I went much further - the system is running
almost ok, except the following (again - repeatable 100%) panic.
panic: isa_dmacheck: no physical page present
db> tr
_Debugger()
_panic()
_isa_dmarangecheck()
_isa_dmastart()
_fdstate()
_fdintr()
Xresume6()
--- interrupt
_default_halt()
The recipe to get this is as follows:
* mount an FFS floppy:
mount /dev/fd0 /mnt
* unmount it:
umount /mnt
You'll get a kernel message saying:
fd0: probing for MBR.. rejected.. Slice includes MBR nope
fd0: probing for disklabel.. yep
part 0, start=0, size=2880
part 1, start=0, size=2880
dkl: slice 1 overlaps slice 0
* now try to mount an MSDOS floppy:
mount -t msdos /dev/fd0 /mnt
Now you get the panic.
Any other combination of mounting/umounting other partitions on IDE (wd)
drives seem to work ok, even if they contain MSDOSFS.
I also have some questions:
* What happened with /dev/fd0c ??? DEVFS doesn't create it - I usually
mounted floppies using this device... It doesn't create them 'on the fly'
either. Hmm... Could it be possible that DEVFS create needed device nodes
(if possible, i.e. if there was really a disklabel or something) when the
name is first used, and when the underlying medium vanishes it could
return 'device not configured' or something like this...
* I originally had /dev/modem -> /dev/cuaa0. What should I do now? (except
recreating it every time the system starts...)
And last but not least: thank you for your work! We're approaching the
target step by step... :-)
Andrzej Bialecki
--------------------+---------------------------------------------------------
abial@nask.pl | if(halt_per_mth > 0) { fetch("http://www.freebsd.org") }
Research & Academic | "Be open-minded, but don't let your brains to fall out."
Network in Poland | All of the above (and more) is just my personal opinion.
--------------------+---------------------------------------------------------
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.NEB.3.95.980424224410.19560B-100000>